Reading a character without echoing it

[Jose Romildo Malaquias]

How can a single character be read from standard input without echoing it
to the console in Haskell 98?

Bird's book mentions two functions for reading a character
        getChar, getCh :: IO Char
but Haskell 98 does not seem to have getCh, which should do the no echoing
reading.

Thanks.

Prof. Jos� Romildo Malaquias <[EMAIL PROTECTED]>
Departamento de Computa��o
Universidade Federal de Ouro Preto
Brasil